fusing a relay
Printed From: the12volt.com
Forum Name: Car Security and Convenience
Forum Discription: Car Alarms, Keyless Entries, Remote Starters, Immobilizer Bypasses, Sensors, Door Locks, Window Modules, Heated Mirrors, Heated Seats, etc.
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=124016
Printed Date: May 05, 2024 at 10:03 PM
Topic: fusing a relay
Posted By: sean11901
Subject: fusing a relay
Date Posted: October 19, 2010 at 10:29 PM
if making a relay for a negative based factory alarm disarm or any other purpose what fuse size should i use just for the 12V wire going to the pin# 86 on the relays coil.
Replies:
Posted By: oldspark
Date Posted: October 20, 2010 at 12:35 AM
You don't need to fuse the coil per se - it would only be if you wanted to protect the +12V source, or the wire from it to the coil's #86.
Posted By: howie ll
Date Posted: October 20, 2010 at 5:07 PM
If the factory arm/disarm was neg based, you wouldn't need a relay, since all the R/S outputs for this function from every alarm manufacturer are neg. Even so not more than 2amps in this case.
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Amateurs assume, don't test and have problems; pros test first. I am not a free install service.
Read the installation manual, do a search here or online for your vehicle wiring before posting.
Posted By: sean11901
Date Posted: October 21, 2010 at 10:29 AM
howie ll wrote:
If the factory arm/disarm was neg based, you wouldn't need a relay, since all the R/S outputs for this function from every alarm manufacturer are neg. Even so not more than 2amps in this case.
really? In the manual for the 4113 install it says to use the (-200 ma factory disarm output) hooked up to a relay even if its a negative triggered system?
Posted By: howie ll
Date Posted: October 21, 2010 at 10:58 AM
Sorry, mini relay, 2amps max or even a transistor trigger, Oldspark can probably give you a circuit.
Also you will find they are WRONG. Most factory disarms draw about 120milliamps.
But if it makes you feel better use a pcb/mini relay, eg DEI 8616.
-------------
Amateurs assume, don't test and have problems; pros test first. I am not a free install service.
Read the installation manual, do a search here or online for your vehicle wiring before posting.
Posted By: howie ll
Date Posted: October 21, 2010 at 10:59 AM
Of course it would help if you would tell us what vehicle?
-------------
Amateurs assume, don't test and have problems; pros test first. I am not a free install service.
Read the installation manual, do a search here or online for your vehicle wiring before posting.
Posted By: sean11901
Date Posted: October 21, 2010 at 12:28 PM
howie ll wrote:
Of course it would help if you would tell us what vehicle?
08 ford fusion.. thanks for everything howiee
Posted By: howie ll
Date Posted: October 21, 2010 at 1:55 PM
OK, I've looked at the instructions and I STILL can't see why they need a relay! Except for polarity change which isn't necessary on your vehicle, it's a PURPLE / something and it's neg.
However sort of calling them and asking their reasons, I'll take their word...except on the directwire vehicle specific installation guide, it isn't mentioned at all, the point here is that the Avital's neg alarm disable wire would carry the same current rating as say a Viper 5902; in fact the rating would be the same on ALL DEI product,why isn't this mentioned on say Python or Viper or Clifford install guides, don't tell me I've caught yet another DEI typo.
-------------
Amateurs assume, don't test and have problems; pros test first. I am not a free install service.
Read the installation manual, do a search here or online for your vehicle wiring before posting.
Posted By: howie ll
Date Posted: October 21, 2010 at 2:05 PM
Just went back to the 5901, that lists those relays so I apologise! 8166
mini relays with a 2 amp fuse.
-------------
Amateurs assume, don't test and have problems; pros test first. I am not a free install service.
Read the installation manual, do a search here or online for your vehicle wiring before posting.
Posted By: sean11901
Date Posted: October 21, 2010 at 2:28 PM
so the -200 ma output wint be enought to trigger the disarm wire? :/
Posted By: howie ll
Date Posted: October 21, 2010 at 3:05 PM
To my mind it should, but I have no experience with this vehicle, hence ring DEI tech, I'd like to know what they say.
The only alternative would to be to contact Ford and ask them. Good luck.
-------------
Amateurs assume, don't test and have problems; pros test first. I am not a free install service.
Read the installation manual, do a search here or online for your vehicle wiring before posting.
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